Water-heater.



G. v. ANDREWS..

WATER HEATER.

APPLICATION FILED mare, 190a.

Patentd Sept. 14,1909

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GEORGE V. ANDREWS, F HARVARD, ILLINOIS.

WATER-HEATER.

Specification of Letters Patent.

Patented Sept. 14, 1909.

Application filed May 6, 1908. Serial No. 431,077.

To all whom it may concern:

Be it known that I, GEORGE V. ANDREWS, a citizen of the United States,residing at Harvard, in the county of McHenry and State of Illinois,have invented certain new and useful Improvements in Water-Heaters, ofwhich the following is a specification.

My invention relates to water heaters and has particular reference tothat class of devices designed to be submerged in the water to beheated.

The chief objects of the improvements which form the subject matter ofthis application are: to provide a simple apparatus for accomplishingthe purposes in view; to furnish an appliance that will be equallyefiicacious under variations in the water level, and to provide a waterheater so arranged as to apply the available heat in a manner bestsuited to produce the maximum efiect.

Further objects of this apparatus are to provide means for utilizing thesurplus or waste heat for other purposes than that of heating water; tofurnish a casing of special construction through which the water willfreely circulate thus causing an approxi-- mately uniform distributionof the heated water, and to produce a portable device for the purposesset forth and one that can be manufactured economically.

Vhile the devices herein described are particularly intended to be usedfor heating water in tanks for the use of stock on farms and ranches andis arranged for that particular application, it will be readily seenthat the same appliance may be utilized for raising the temperature ofwater in any vessel available and for other purposes.

I accomplish the desired results by the employment of the apparatusillustrated in the accompanying drawing forming a part of thisapplication, and in which Figure 1 is a vertical longitudinal section onthe line 11 of Fig. 2; Fig. 2 is a top plan View with the cover removed,and Fig. 3 is a fragmentary view showing the applicationof an auxiliaryutensil.

Referring to the details of the drawing the numeral 5 indicates anexternal shell or casing, cylindrical in form, open at the top andhaving a bottom 6, to which are attached feet 7, thus raising thestructure above the bottom of the tank (not shown). The upper margin ofsaid casing 5 is furnished with a reinforcing wire 8, common in suchstructures, and is supplied with a cover 5. Located concentrically withthe outer casing is an inner casing 9, the walls of which flareoutwardly from below upward. The lower end of said inner casing 9 iscircular and provided with a bottom plate 10. This casing is supportedby lugs 11, which rest upon the bottom (3 of the external shell. Thebottom plate 10 has a central opening 12 in which is inserted a shortlength of pipe 13 which passes through an orifice in the bot tom of theouter casing. This pipe is secured by soldering or in other suitablemanner to the plates through which it passes in order to form watertight joints therebetween. The upper end of the inner casing 9 assumes arectangular shape, as shown in Fig. 2 and the corners 14 of therectangle engage the inner face of the casing 5 at points below theupper rim, so that the inner casing is firmly supported laterally. Theinterior of the inner casing or water chamber 15 communicates with theoutside of the outer casing through the medium of series of tubes 16placed in diametrically opposite vertical rows at spaced intervals. Theouter ends of said tubes project beyond the casing wall and are suppliedwith removable caps 17, held frictionally, connection as shown at 17* inthe drawing. I prefer to form the casings thus described of galvanizedsheet iron, and use the same material wherever practicable throughoutthe entire structure.

I prefer to employ gasolene for fuel, and have shown the devices adaptedto employ this oil, although illuminating or other gas may be used whenmore convenient. Two burners are installed, both in ring form. A mainburner 18 surrounds the lower end of the inner casing 9 and an auxiliaryburner 19 is concentrically located above the said casing. An oilreservoir 20 is connected by an oil pipe 21 with a generator 22 belowwhich is located the generating jet 23. The generated gas then passesthrough a gas pipe 24 to the main burner 18 a branch 25 supplying theauxiliary burner 19. A suitable valve 26 controlled by a hand wheel 27regulates the supply of gas to the burners, and a second valve 28 cutsoff the gas supply to the burner 19 when not in use.

The space 29, between the inner and outer casings forms a combustionchamber, and the burner 18 which is located at the bottom of thischamber is supplied with air to supor having threaded port combustionthrough pipes or ducts formed by curved plates 31 attached to the innerface of the outer casing 5. These ducts two in number are placeddiametrically opposite each. other and have openings 32 at the bottomcommunicating with the chamber 29. The outer casing is furnished with anumber of holes 83 located adjacent to the ducts 30 to supply cold airthereto. Just above the inner casing is placed a hot air deflecting ring34, inclined at an angle so that the heated air rising from the mainburner 18 and passing along the flaring sides of the inner casing willbe forced toward the center of the structure. This ring fits tightlyaround the outer margin where it engages the wall of the outside casing,being cut away at opposite points to allow the passage of the cold airducts 30.

The upper auxiliary burner 19 is intended to be used in very coldweather and when a large quantity of water is to be heated. It may alsobe employed for other purposes such as cooking feed, warming milk, orquickly producing very hot water for scalding milk cans. F or such usesa special utensil or cooker 35 is provided. The bottom 36 of the cookeris contracted so that the body of the vessel will rest upon thereinforced margin 8 of the outer casing, and as'the top of the cooker isof the same diameter as said casing the same cover 5 may be used forboth, as shown in Figs. 1 and 3.

The details of construction having thus been disclosed I will nowdescribe the manner in which the apparatus is employed. To warm thewater in a stock tank for drinking purposes, the reservoir having beensupplied with the requisite quantity of fuel oil, the entire apparatusis placed in the water to be heated, the feet 7 resting upon the bottomof the tank or suitable support raised above the tank bottom (not shownin the drawing). The water level must be at some point (Fig. 1.) belowthe holes 83 in the outer casing, and the caps 17 removed from thosetubes 16 which are immediately below the water level, as shown at 17. As

, soon as the heater is placed in the tank the water will pass throughthe pipe 13 and till the interior of the inner casing onwater chamber toa level with the water outside. The gas having been generated in theusual manner and the lower or main burner 18 ignited, the cold air willpass down the ducts 30 to supply combustion and the air in thecombustion chamber will become heated and ascend, as aforesaid, alongthe flaring inner casing wall, thus getting the maximum of- As the waterwithin the inner casing becomes warm it will rise and pass out throughthe open pipes 16, cold water entering at the lower orifice 13 to takeits place. This circulation of the Water will continue so long as theconditions remain unchanged.

The application of the auxiliary burner will be evident upon inspectionof Fig. 3 which shows the relation of the auxiliary biu'ner and the feedcooker.

It will be seen that by regulating the flame of the burner to suitweather conditions the water in a tank may be kept at practically auniform temperature provided the water level does not recede below theopen tube. When this does take place the exposed tube must be closed andthe lower tube opened to obtain the proper circulation. If desired allthe tubes 16 may be closed in which'case the water in the interior ofthe inner casing Wlll be heated to a much hlgher degree owing to itsbeing confined the only communication with the tankbeing in this case;

through the pipe 13. I

Having thus described my invention, what I claim as new, is 2- 1. Awater heater, comprising an outer combustion chamber, and an inner waterchamber, the walls of the water chamber flaring outwardly from belowupward, a burner in the combustion chamber at the base of thewaterfchamber, a vertical centrally arranged tube connecting the water chamberwith the exterior of the outer chamber, a plurality of horizontal tubesconnecting the water chamber'with the exterior of the combustionchamber, said tubes being arranged at spaced intervals in differentplanes and having removable closures, a plu-. rality o-f'air ductsarranged diametrically opposite upon the outer wall of the combustionchamber, and an annular deflecting ring attached at its periphery to theouter wall. of the said combustion chamber, and extending partially overthe water chamber.

2. In a water heater, an outer casing, a cover supported on said casing,an inverted frusto conical water chamber arrz-mged within said casing,an annular burner surrounding thebase of said chamber and in closeproximity thereto, a burner arranged at the top of said water chamber,means for conducting water to and from said water chamber and meansforsupplying said burners with fuel.

In testimony whereof I aflix my signature in the presence of twowitnesses.

GEORGE v. ANDREWS.

Witnesses I P. E. SAUNDERS,

ELMER HAM vtoNn.

